<button (click)="menu.toggle(key)"
        [nzTooltipTitle]="menu.isPinned(key) ? '点击取消固定在主菜单' : '点击固定到主菜单'"
        nz-button nz-tooltip
        nzShape="circle"
        nzType="link"
>
        <span [nzTheme]="menu.isPinned(key) ? 'fill' : 'outline'" class="pin-button" nz-icon
              nzType="pushpin"></span>
</button>
